The service consists of the following steps: (1) Statistical downscaling of the results of a large ensemble of available global and regional climate models, in order to obtain climate scenarios on extreme precipitation for different time scales and return periods T at the local scale of a specific city or municipality; (2) Rainfall intensity - duration - frequency (IDF) curves and synthetic design storms (storms for given return periods) obtained based on local time series of precipitation data; (3) IDF curves and T-year storms after climate scenarios; (4) High resolution urban pluvial flood model set up based on dual drainage approach: 1-D sewer network model integrated with a 2-D surface inundation model; (5) Detailed 2-D pluvial flood hazard maps obtained for different return periods before and after climate change, and taking climate change uncertainties into account.